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Note 3 - Long-Term Debt Financing (Tables)
6 Months Ended
Jun. 30, 2023
Notes Tables  
Schedule of Maturities of Long-Term Debt [Table Text Block]

Year ending December 31,

 

Principal

 

2023 (excluding the six-months ended June 30, 2023)

 $485,000 

2024

  2,094,000 

2025

  2,469,000 

2026

  7,294,000 

2027

  164,000 
  $12,506,000